TY - GEN
T1 - Deep-investigated Flux Weakening Analysis of the Direct-drive Surface Permanent Magnet Vernier Motors for Traction Applications
AU - Zhu, Jingwei
AU - Yuan, Xin
AU - Eric Cheng, Ka Wai
AU - Lee, Christopher H.T.
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022/9
Y1 - 2022/9
N2 - Performance in the flux weakening region is quite essential for electric motors applied to electric vehicle (EV) applications over the driving cycle. The surface permanent magnet vernier motor (SPMVM) exhibits its potential in direct-drive EV applications due to the features of high torque density and simple structure. However, the flux weakening analysis of this type of machine is not deeply investigated. Compared with the surface permanent magnet synchronous motor (SPM), the SPMVM possesses more working harmonics, which in turn introduces unique characteristics in the flux weakening region, including the flux density harmonics interaction and losses. This article presents a deep investigation into flux interaction and losses in the flux weakening region for the SPMVM. The comparison of the inductance and permanent magnet (PM) flux linkage between SPMs and SPMVMs is implemented. Then, the flux interaction between the armature winding and the PM is analyzed. The losses produced from the synthesized flux density are evaluated for motor with various geometric parameters and the design guidelines for SPMVMs considering the losses issue in the flux weakening region are proposed. Finally, a prototype is fabricated to verify the loss analysis and design guidelines for SPMVMs.
AB - Performance in the flux weakening region is quite essential for electric motors applied to electric vehicle (EV) applications over the driving cycle. The surface permanent magnet vernier motor (SPMVM) exhibits its potential in direct-drive EV applications due to the features of high torque density and simple structure. However, the flux weakening analysis of this type of machine is not deeply investigated. Compared with the surface permanent magnet synchronous motor (SPM), the SPMVM possesses more working harmonics, which in turn introduces unique characteristics in the flux weakening region, including the flux density harmonics interaction and losses. This article presents a deep investigation into flux interaction and losses in the flux weakening region for the SPMVM. The comparison of the inductance and permanent magnet (PM) flux linkage between SPMs and SPMVMs is implemented. Then, the flux interaction between the armature winding and the PM is analyzed. The losses produced from the synthesized flux density are evaluated for motor with various geometric parameters and the design guidelines for SPMVMs considering the losses issue in the flux weakening region are proposed. Finally, a prototype is fabricated to verify the loss analysis and design guidelines for SPMVMs.
KW - air gap flux density
KW - finite element analysis
KW - loss
KW - Permanent magnet
KW - vernier motor
UR - http://www.scopus.com/inward/record.url?scp=85149121125&partnerID=8YFLogxK
U2 - 10.1109/PESA55501.2022.10038328
DO - 10.1109/PESA55501.2022.10038328
M3 - Conference article published in proceeding or book
AN - SCOPUS:85149121125
T3 - Proceedings of the 9th International Conference on Power Electronics Systems and Applications, PESA 2022
BT - Proceedings of the 9th International Conference on Power Electronics Systems and Applications, PESA 2022
A2 - Cheng, Ka-wai Eric
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 9th International Conference on Power Electronics Systems and Applications, PESA 2022
Y2 - 20 September 2022 through 22 September 2022
ER -